Connection con=null;
    try{
        Class.forName("com.mysql.jdbc.Driver");
        System.out.println("connection close 1111111111111111111");
        con =  DriverManager.getConnection("jdbc:mysql://localhost/", "root", "admin123");
        System.out.println("connection"+con);
        con.close();
    }catch(Exception e){
        con.close();
        System.out.println("connection  not close");
        e.printStackTrace();
    }
    finally{
        con.close();
        System.out.println("connection  finally close");
    }

}